("knowledge"), so it's the process of finding answers to how and why the world works as it does. From why the sky's blue to how your nose smells, from why boats float on water to what makes us happy or sad, you can seek answers—and enlightenment— in all kinds of ways: you ...
The person who figured this out experimentally was James Prescott Joule. In his experiment, there was a large container full of water that had a paddle wheel fixed inside it. The paddle wheel was connected to an axle around which a string was wrapped many times. The string was looped over ...
A visual way to explain density is by examining a floating object. Ice or a piece of cork floats in a glass of water. You can start by asking your audience to consider why some objects float and other objects sink. The answer, of course, is density. Gravity pulls on all objects, and...
He lands and boards a water taxi, and he can finally breathe a little, as he and his dad float down the centuries-old canal. “And now it's midnight, and it's a full moon, and it's Halloween,” he says. “And I'm pouring his ashes in the water.” And then? “All the chur...
There are many variants on this problem, adjusting the circumstances, the number and nature of the people at risk, the responsibility of the subject, etc., in order to fully explore why you would make the decision that you make. This problem is frequently discussed in connection with AI, ...
which would normally turn alternating current at the top and bottom into direct current on the left and right. In this case, it is labeled as a "moral rectifier". This is presumably a play on the idea of moral rectitude – it makes your circuit more moral. Why this matters in a circui...
Bridges in harmony Why do bridges collapse? Find out more The wonder of bridges In the endless war of people versus nature, there will only ever be one winner—but humans can still console themselves with occasional victories, which is what the world's greatest bridges represent. Whether we ...
If a man can't fly, how can a plane fly if it weighs as much as 5000 men? How come we say a wheel reduces friction if it's got a tire that grips the road? Why do huge ships float when even tiny bits of metal sink?
units. Helium also has the property of being lighter than air, so if this reserve is large enough, the phone could float away if let go. However, this is unlikely, as the phone boasts other, heavy components such as large magnets, a water reserve, and a critical mass of fissile ...
That's far hotter than the water most people would use to wash by hand, which is one reason why dishwashers are more hygienic (remove more bacteria) than ordinary hand-washing. The other reason is that the dishes are washed for much longer. An electric pump at the bottom of the machine...